Google will never share this data without notifying you first and asking for your permission. You can manage these settings from your mobile device or from your desktop, although the settings pages might look different.

Managing your applications on Android

You’ll then see a list of apps that you’ve granted access to your Google Account. If you see an app on there that you don’t use anymore, you should disconnect the app from your Google Account (you can do this by clicking on the app and selecting Disconnect).

Google+ Sign-in

If you’ve signed up for Google+, you might see some apps that use Google+ sign-in. You can manage these apps on your Android, or on your desktop.

Managing your applications on your desktop

Visit your Account permissions page.
Here, you’ll see a list of the third-party sites you selected to always approve for Google authentication. If you see something on there that you don’t use anymore, you should click to Revoke Access.

Works across different browsers

When you provide consent to an app to access your Google Account, that consent works automatically across all the ways you might access that app (over the web in a browser, the downloaded app on Android, iOS, or some other platform). The app may access your account when you’re not using it. For example, let’s say you’ve downloaded an app on your phone that helps you schedule workouts with friends, and allowed it to access your Google Account. The app might access your Google Contacts information while you’re not using it in order to help recommend some friends you can connect with the next time you sign in to the app. Or, it could access your Calendar to identify times when you and your friends are free to work out together.

The app may also automatically sign you in the next time you use it.

Google doesn't review or endorse third-party websites that request access to your Google Account, and takes no responsibility for those sites. If you don't trust the website that is requesting your information, you should not approve the request.